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Finding the Fourth Proportional to 661,087.29, 991,603.23 and 211,798.22

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Solution

The fourth proportional to 661,087.29, 991,603.23 and 211,798.22 is: 317,688.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,087.29 : 991,603.23 = 211,798.22 : x
  2. Step 2: Convert to fraction form
    661,087.29/991,603.23 = 211,798.22/x
  3. Step 3: Cross multiply
    661,087.29x = 991,603.23 × 211,798.22
  4. Step 4: Simplify right side
    661,087.29x = 210,019,794,499.36
  5. Step 5: Solve for x
    x = 210,019,794,499.36/661,087.29
  6. Step 6: Final answer
    x = 317,688.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.